Question: How should I verify a cobb-douglas function f(x, y, z) = x^0.5y^0.4z^0.2 is a quasi-concave function but not concave function when apply the calculus criteria

How should I verify a cobb-douglas function f(x, y, z) = x^0.5y^0.4z^0.2 is a quasi-concave function but not concave function when apply the calculus criteria to Hessian matrix and the bordered Hessian matrix? (suppose that x, y, z are all bigger than zero)

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To verify whether the CobbDouglas function fx y z x05 y04 z02 is a quasiconcave function but not a concave function we can examine the Hessian matrix ... View full answer

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